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What classes are present in subphylum eleutheroza?
The classes present in subphylum Eleutherozoa include Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies and feather stars), and Holothuroidea (sea cucumbers).
Is archaebacteria present or extinct?
Archaebacteria is still present today and not extinct. Archaebacteria is a single cell microorganism and was once classified as bacteria.
What is Extinction?
Extinction is when a animal doesn't exist any more, because all of its species has died out completely. It Can Also Be When Only A Few Animals Live But Most Are Dead Just Like A Mammoth is dead.
What are the threats caused by human activity to a sea lion?
This could kill all the sea lions present in the sea , In the end it will become extinct , Now the meaning of extinct is as follows : Species that are no longer present on earth is called extinct species .
What is a palaeosubspecies?
A palaeosubspecies is an extinct species of animal which evolved into its present form.
What classes are insects and arthropods in?
Under arthropoda are Subphyla Chelicerata, Myriapoda, Crustacea, and Hexapoda. (There is also an extinct class Marrellomorpha and an the extinct Trilobite subphylum). The chelicerata, like spiders, scorpions, mites, etc., get their name from having appendages appear before the mouth; myriapods like centipedes and millipedes characterized by a high count of body segments and legs; crustaceans like crabs, shrimp, woodlice characterized by their biramous (two-part) limbs and a specialized larval form; hexapoda named for their consolidated thorax with only three pairs of legs. There are many classes below these subphyla.. here is a list: Trilobita - trilobites (extinct) Arachnida - spiders, scorpions, etc. Merostomata - horseshoe crabs, eurypterids (extinct), etc. Pycnogonida - sea spiders Chilopoda - centipedes Diplopoda - millipedes Pauropoda - sister group to millipedes Symphyla - resemble centipedes Branchiopoda - brine shrimp etc. Remipedia - blind crustaceans Cephalocarida - horseshoe shrimp Maxillopoda - barnacles, copepods, fish lice, etc. Ostracoda - seed shrimp Malacostraca - lobsters, crabs, shrimp, etc. Insecta - insects Entognatha - wingless Camptophyllia (extinct class) Marrellomorpha (one extinct species) Some classes are still uncertain and debate is ongoing as to placement in the taxonomic tree.
What word describes the present state of the messenger pigeon and the dodo bird?
extinct
How many years bobcats can be extinct?
The bobcat is not endangered, nor at present is it threatened.
Does extincion have an effect on animals mating?
an animal that is present in an environment but not breeding is extinct
What rhinos have gone extinct?
Extinct is an incomparative word. Things are either extinct or not, you cannot have degrees or levels of extinction. At present the rhinoceros is greatly endangered and may become extinct.
Does a saber-toothed tiger live in the present day?
Nope they became extinct after the Ice Age
How do you spell Extionct?
EXTINCT - no longer present, or no longer in use (esp. plants and animals that have died out)
